Guildline 6564 Manuale utente
TECHNICAL MANUAL
FOR
MODEL 6564
HIGH RESISTANCE SCANNER
NOTICE
The contents and information contained in this manual are proprietary to Guildline
Instruments Limited. They are to be used only as a guide to the operation and
maintenance of the equipment with which this manual was issued, and may not be
duplicated or transmitted by any means, either in whole or in part, without the written
permission of Guildline Instruments Limited.
TM6564-C-00
26 April, 2011
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i
WARRANTY AND SERVICE
CERTIFICATION: Guildline Instrument Limited certifies that this product was tested
and inspected and found to meet its published specifications when it was shipped from
the factory.
WARRANTY: This product is warranted against defects in materials and workmanship
for a period of one year from date of shipment. During the warranty period, Guildline
Instrument Limited will, at its option, either repair or replace products that prove to be
defective.
SERVICE: For warranty service or repair, this product must be returned to the factory.
The buyer shall prepay shipping charges to Guildline Instrument Limited and Guildline
Instrument Limited shall pay surface shipping to the buyer. Permission must be obtained
from the factory for warranty repair returns.
LIMITATIONS: The foregoing warranty shall not apply to defects resulting from
improper or inadequate maintenance by the buyer, or unauthorized modifications or
misuse.
Neither Guildline Instrument Limited nor any of its employees shall be liable for any
direct or indirect, special, incidental or consequential damages arising out of the use of
this product.
No other warranty is expressed or implied.
SAFETY PRECAUTIONS
This product has been designed and tested in accordance with IEC1010-1/EN61010-1
including amendment 1(1995) for insulation category II use. Use of this equipment in a
manner not specified could result in personal injury.
AC POWER SOURCE: This product is intended to operate from an ac power source
that will apply not more than 264 V ac between either of the supply conductors and
ground.
POWER CORD: Use only the power cord and connector appropriate for the voltage and
plug configuration in your country. The cord must contain a safety ground conductor and
be connected to a plug that has a connection to earth ground. Use only a power cord that
is in good condition.
SIGNAL INPUT POWER: Signals applied to the input or output terminals must be
limited to levels deemed safe by the IEC/EN specifications. When applied voltages are
above 30 volts, the current source must limit the current to not more than 2 milliamps.
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TABLE OF CONTENTS
1. INTRODUCTION .................................................................................................. 1-1
1.1. DESCRIPTION.....................................................................................................................................1-1
1.2. SPECIFICATIONS...............................................................................................................................1-2
1.3. REAR PANEL CONNECTIONS.........................................................................................................1-3
1.4. REFERENCE STANDARD PROTECTION SYSTEMS..................................................................1-3
2. INSTALLATION ................................................................................................... 2-1
2.1. INITIAL INSPECTION .......................................................................................................................2-1
2.2. POWER REQUIREMENTS................................................................................................................2-1
2.3. LOCATION ...........................................................................................................................................2-1
3. OPERATION ........................................................................................................ 3-1
3.1. FRONT PANEL CONTROLS AND INDICATORS .........................................................................3-1
3.2. REAR PANEL CONNECTIONS.........................................................................................................3-2
3.3. FRONT PANEL OPERATION ...........................................................................................................3-3
3.4. ADDRESS SELECTION......................................................................................................................3-3
3.5. OPERATION FROM INTERFACE BUS...........................................................................................3-5
3.6. SAMPLE PROGRAMS........................................................................................................................3-6
3.7. REMOTE LOCK ..................................................................................................................................3-7
3.8. STANDARD PROTECTION FOR MULTIPLE SCANNERS .........................................................3-7
4. THEORY OF OPERATION................................................................................... 4-1
4.1. INTRODUCTION.................................................................................................................................4-1
4.2. HIGH ISOLATION LOW NOISE DESIGN ......................................................................................4-1
4.3. LOGIC CIRCUITS...............................................................................................................................4-1
4.4. PROTECTION FOR DEVICES CONNECTED TO THE SCANNER ...........................................4-2
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5. MAINTENANCE AND TROUBLE SHOOTING.................................................... 5-1
5.1. PERIODIC MAINTENANCE .............................................................................................................5-1
5.2. UNSTABLE READINGS .....................................................................................................................5-1
5.3. RELAY FAILURES..............................................................................................................................5-1
5.4. LOCATING THE RELAY CHANNELS............................................................................................5-2
6. CIRCUIT DIAGRAMS AND REPLACEMENT PARTS LIST................................ 6-1
6.1. INTRODUCTION.................................................................................................................................6-1
6.2. ORDERING INFORMATION ............................................................................................................6-1
6.3. CIRCUIT DIAGRAMS AND PARTS LISTS.....................................................................................6-2
7. DECLARATION OF CONFORMITY..................................................................... 7-1
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TABLE OF FIGURES
FIGURE 1-1 HIGH RESISTANCE SCANNER GUILDLINE MODEL 6564..................................................1-1
FIGURE 3-1 FRONT PANEL GUILDLINE MODEL 6564...............................................................................3-1
FIGURE 3-2 REAR PANEL GUILDLINE MODEL 6564..................................................................................3-2
FIGURE 4-1: FUNCTIONAL DIAGRAM OF SCANNER..................................................................................4-2
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LIST OF TABLES
TABLE 3-1: BUS ADDRESS...................................................................................................................................3-4
Section 1
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1-1
1. INTRODUCTION
1.1. DESCRIPTION
The Guildline Low Thermal Scanner, with extremely low leakage, is ideal for automating
precision high value measurements to ppm accuracy. This scanner has high isolation and
low noise making it suitable for a wide variety of uses. It can be used for high resistance
measurements into the Peta-Ohms as well as low current measurements into the fempto-
Amps.
Special care has been taken to minimize leakage and noise susceptibility. The switches
used are latching relays requiring only a few millisecond pulses to actuate. Several
systems are used to protect the devices connected to the scanner from being damaged by
operator error or scanner failure. It can be operated from the front panel or by commands
sent over the General Purpose Interface Bus.
The 6564 has been designed in a modular fashion in banks of 8 channels. It is possible to
have either 16 channels or 8 channels installed. A cover plate is installed on the front and
rear of the 8 channel models covering the channels 9 through 16. This allows for the 8
channel model to be factory upgraded to 16 at any time.
Figure 1-1 High Resistance Scanner Guildline Model 6564
Section 1
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1-2
1.2. SPECIFICATIONS
NUMBER OF INPUTS
8 or 16 for Model 6564
ISOLATION **
700 Peta-Ohms Typical, 100 Peta-Ohms Minimum
SYSTEMATIC ERROR DUE CHANNEL VARIABILITY **
Leakage will vary by 3.3% of 100 Peta-Ohms typical, 5% of 100 Peta-Ohms
maximum.
ENVIRONMENTAL LIMITS
Operating: 10oC to 40oC up to 80% relative humidity
Storage: -20oC to 65oC up to 95% relative humidity
** Note: Specifications apply only if temperature is stable within 1oC, free of
drafts and the relative humidity is below 70%. Warm the scanner up for 2 hours
min.
SCANNER CONTROL
Local, using front panel push-buttons
Remote, via IEEE-488 bus (interface included)
RELAY CONTACT RATINGS
Life: greater than 10,000,000 cycles at low levels
Current: 2 amps maximum at 10 volts
Voltage switched: 100 volts maximum at 1 milliamp
Voltage non-switched*: 1000 volts max. (for terminal inputs)
*CAUTION - reduce voltage before actuating relays.
NOTE: when applied voltage is above 30 volts, the current source must limit the
current to less than 2 milliamps to meet IEC 1010-1/EN61010-1 safety
requirements.
SIZE
Length: 420 mm (16.5 in.)
Width: 451 mm (17.7 in.)
Height:133 mm (5.2 in.)
WEIGHT
16 channel scanner: 10 kg (23 lb.)
LINE POWER
100V, 115V-127V, 220V-230V, 240V all ±10%; 50-60 Hz
Section 1
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1-3
1.3. REAR PANEL CONNECTIONS
SCANNER INPUTS
Low noise High Voltage BNC for voltage source, Low noise Triax for input (low
current return).
OUTPUT LINES
Two low noise N-Type connectors, one each for source and input.
INTERFACE BUS
24 pin IEEE-488 connector, CINCH No. 57-20240
REFERENCE STANDARD PROTECTION
Screw terminals connected to open collector TTL logic circuit. Terminal goes
low (0 volts) when any relay is closed, and goes high (5 volts through 10k ohm)
when all relays are open. This line can be connected in parallel with other
scanners cascaded in a large system to protect standards from being shorted
together.
1.4. REFERENCE STANDARD PROTECTION SYSTEMS
Three systems are used to help protect standards from being damaged due to scanner
failure or operator error. These systems are described briefly below. See Theory of
Operation Section for complete description.
a. The relays are driven from a decoder so that only one output circuit can be
activated for any possible input combination.
b. Contacts on each relay are connected in series so that all input lines must be open
before power is available to close a relay.
c. Two push-buttons must be depressed at the same time to actuate any relay, which
requires two hands to operate.
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