Robertshaw 158A Manuale utente

MODEL 158A 909GF197B

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INSTRUCTION MANUAL

FOR

MODEL 158A

LEVEL-TEL

We do our level best

Industrial Products Division

1602 Mustang Drive

Maryville, Tennessee 37801

Phone: (865) 981-3100 Fax: (865) 981-3168

INSTRUCTION MANUAL NUMBER

909GF197B

P-2410

Probe, Cable and Conduit Outlet Box

shown for illustration only.

Must be ordered separately.

MODEL 158A 909GF197B

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Section I – DESCRIPTION

1.1 GENERAL

The Robertshaw Model 158A Level-Tel is a

capacitance operated DC current transmitter with

noninteracting and independent zero and span

adjustments internally located. The transmitter is

remotely mounted from the probe with a triax

cable interconnected between the probe and the

transmitter.

1.2 MODEL IDENTIFICATION

Identify instrument models in accordance with the

descriptions and variations listed in each table.

158A - B 1 - A 1

Key Model No.

Table 1 – Output Current

Table 2 – Supply Voltage

Table 3 – Display Housing and Indication

Table 4 – Alarm Options

KEY MODEL NO.

Model

No. Description

158A Capacitance-to-current transmitter

system for remotely mounted probe

assemblies. Control Unit is

available with or without indication

and optional alarms.

Table 1 – OUTPUT CURRENT

Desig. Description

A 1-5 mADC

B 4-20 mADC

C 10-50 mADC

D 0-10 mADC

Table 2 – SUPPLY VOLTAGE

Desig. Description

1 26.5 VDC, ±10%

2 120 VAC, ±10%, 50/60 Hz

3 240 VAC, ±10%, 50/60 Hz

Table 3 – DISPLAY HOUSING AND

INDICATION

Desig. Description

A Water tight enclosure without

indicator.

Meets NEMA Type 4 and CSA

Enclosure 5.

B Water tight housing with indicator.

Meets NEMA Type 4 and CSA

Enclosure 5.

C Explosion proof housing without

indicator.

For Class I, Division 1, Groups C

and D; Class II, Division 1, Groups

E, F and G, areas.

D Explosion proof housing with

indicator.

For Class I, Division 1, Groups C

and D; Class II, Division 1, Groups

E, F and G, areas.

E Large weatherproof enclosure with

indicator to be used with optional

alarms.

Meets NEMA Type 12 & 13 and

CSA Encl 3.

Table 4 – ALARM OPTIONS

Desig. Description

1 None

2 ¾Alarm Relays for High or Low

Alarm.

3 ¾Alarm Relays for High and Low

Alarms.

¾May only be used with Designation E on

Table 3.

MODEL 158A 909GF197B

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1.3 TRIAXIAL CABLE ACCESSORY ITEMS

032KE03X-XX¾

GENERAL PURPOSE (polyethylene insulated)

Triax Cable with probe connection conduit

outlet box. (Recommended for use with

customer supplied rigid or flexible conduit.)

Maximum temperature 185°F.

032KE05X-XX¾

GENERAL PURPOSE (polyethylene insulated)

Triax Cable in flexible conduit (protective

armor) with probe connection conduit outlet

box. Maximum temperature 185°F.

032KE04X-XX¾

HIGH TEMPERATURE (Teflon insulated) Triax

Cable with probe connection conduit outlet box.

(Recommended for use with customer supplied

rigid or flexible conduit.) Maximum

temperature 350°F.

032KE06X-XX¾

HIGH TEMPERATURE (Teflon insulated) Triax

Cable in flexible conduit (protective armor) with

probe connection conduit outlet box. Maximum

temperature 350°F.

032KE090-05 (5 ft long)

032KE090-10 (10 ft long)

GENERAL PURPOSE (polyethylene insulated)

Triax Cable in explosion proof flexible conduit

(protective armor) with seal fitting and probe

connection conduit outlet box. Maximum

temperature 185°F.

032KE100-05 (5 ft long)

032KE100-10 (10 ft long)

HIGH TEMPERATURE (Teflon insulated) Triax

Cable in explosion proof flexible conduit

(protective armor) with seal fitting and probe

connection conduit outlet box. Maximum

temperature 350°F.

¾Substitute length in feet for X-XX in part

number.

Example: For 10 feet substitute 0-10

For 120 feet substitute 1-20

Explosion proof cables are standard in 5 and

10 foot lengths.

MODEL 158A 909GF197B

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Section II - SPECIFICATIONS

2.1 ENVIRONMENTAL

Ambient Temperature Limits.......-40°F to +160°F

Vibration Limits................±2 G from 10 to 200 Hz

2.2 ELECTRICAL

Supply Voltage............. 120 VAC ±10%, 50/60 Hz

240 VAC ±10%, 50/60 Hz

26.5 VDC ±10%

Supply Power........................... 5 watts, 7 VA max.

Terminal Capacitance Range............0 to 1000 pF

Span Capacitance Range........10 pF plus 1 pF for

each 10 feet of Triax

cable up to 2000 pF

Maximum Recommended

Terminal/Span Ratio....................................... 10:1

Output Signal

and Load...................1-5 mADC into 0-2500 ohms

4-20 mADC into 0-700 ohms

10-50 mADC into 0-250 ohms

0-10 mADC into 0-1000 ohms

Connecting Cable Length.................150 feet max.

2.3 PERFORMANCE

Linearity.................................. 0.5% max. for span

less than 1000 pF

1% max. for span

greater than 1000 pF

Repeatability...............................................±0.1%

Sensitivity......................................0.01% minimum

Frequency Response.........................-3 db at 1 Hz

Supply Variation Effect ...............0.5%/10% supply

Ambient Temperature Effect:

Span................................................0.01%/°F

Zero............................. 0.01%/F or 0.01 pF/F,

whichever is greater

Output Signal Ripple............................. 0.2% max.

Output Meter Accuracy..................................±2%

2.4 ENCLOSURE

Water Tight ............... NEMA 4, CSA Enclosure 5,

Polyurethane painted cast aluminum

Explosion Proof...Class I, Division 1, Groups C, D;

Class II, Division 1, Groups E, F, G;

Polyurethane painted cast aluminum

Weatherproof..... NEMA 12, 13, CSA Enclosure 3,

Polyurethane painted steel

2.5 INTRINSIC SAFETY

Models 158A – (A, B) (1, 2) – (A, B, C, D) – 1:

Probe circuit is CSA Certified intrinsically

safe for Class I, Division 1, Group C & D;

Class II, Division 1, Group E, F & G

hazardous locations when connected as

shown on drawing 907GA518 (Figure 8).

2.6 AGENCY CERTIFICATIONS

Models 158A – (A, B) (1, 2) – (A, B, C, D) – 1:

CSA Certified .............................File LR 18690

MODEL 158A 909GF197B

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Section III - INSTALLATION

3.1 GENERAL

Examine the instrument for possible shipping

damages. IMPORTANT: If for any reason it is

determined that parts should be returned to the

factory, please notify the nearest Robertshaw

sales representative prior to shipment. Each unit

must be properly packaged to prevent damage.

Robertshaw assumes no responsibility for

equipment damaged in shipment due to improper

packaging.

Choose the location in accordance with good

instrument practice, avoiding extremes of

temperature, humidity and vibration (see

Specifications, Section II).

3.2 PROBE MOUNTING

Level-Tel probes for use with the Model 158A are

purchased separately from a variety of styles and

types which provide for various specific

applications involving liquids or granular

materials. Insulated rod-type probes are normally

used for liquid solutions or liquid-interface

junctions.

Since many materials have a tendency to build up

on the probe over extended periods of operation,

it is advisable on horizontally mounted probes to

place the probe so that its lower tip is below the

gland entrance. This encourages self-cleaning by

permitting the material to drip from the probe.

However, some materials will continue to build up

and cause the Level-Tel to become insensitive or

fail to operate. If such material is being used, the

installation should be made so that the probe is

easily removed for periodic cleaning.

The face of the gland on the rod-type probes

must be installed until nearly flush with the vessel

wall. DO NOT install the probe in a nozzle,

recess, or open-end well, unless the probe was

supplied with a factory assembled sheath as

there is danger of material collecting in such a

recess and causing false operation.

3.3 TRANSMITTER UNIT MOUNTING

The Model 158A is designed for vertical surface

mounting: e.g. wall, panel or column. Choose the

mounting location to avoid extremes of ambient

temperature or vibration (see Specifications,

Section II).

3.4 WATER TIGHT & WEATHERPROOF

TRANSMITTER MOUNTING & ELECTRICAL

CONNECTIONS

See Figures 1, 3, 4, 5, 6 and 7 for the mounting

dimensions and electrical connections of the

Water Tight and Weatherproof Transmitters. See

Figure 8 for interconnection diagram for those

models certified for intrinsically safe probe

installations.

3.5 EXPLOSION PROOF TRANSMITTER

MOUNTING & ELECTRICAL CONNECTIONS

See Figures 2, 3 and 5 for the mounting

dimensions and electrical connections of the

Explosion Proof Transmitter. See Figure 8 for the

interconnection diagram for those models certified

for intrinsically safe probe installations.

MODEL 158A 909GF197B

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INCHES

FIGURE 1

MOUNTING DIMENSIONS FOR MODEL 158A WATER TIGHT ENCLOSURE WITH

AND WITHOUT INDICATOR, MODELS 158A – ( ) ( ) – A1 AND 158A – ( ) ( ) B1.

SEE FIGURE 5 FOR DIMENSIONS OF

PROBE MOUNTED CONDUIT OUTLET BOX.

MODEL 158A 909GF197B

- 7 -

INCHES

FIGURE 2

MOUNTING DIMENSIONS FOR MODEL 158A EXPLOSION PROOF ENCLOSURE WITH

AND WITHOUT INDICATOR, MODELS 158A – ( ) ( ) – C1 AND 158A – ( ) ( ) – D1.

SEE FIGURE 5 FOR DIMENSIONS OF PROBE

MOUNTED CONDUIT OUTLET BOX.

MODEL 158A 909GF197B

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TERMINAL

TERMINAL CONNECTION REMARKS

PROBE TRIAX WHITE LEAD

SHLD TRIAX RED LEAD

GND TRIAX BLACK LEAD

1 N ( ) SUPPLY

2 H (+) SUPPLY SEE RATING PLATE

(120 VAC, 240 VAC OR 26.5 VDC)

GND CHASSIS GROUND

3 ( ) OUTPUT SIGNAL

4 (+) OUTPUT SIGNAL SEE NOTE 1

NOTES:

1. REMOVE JUMPER ACROSS OUTPUT TERMINALS 3 AND 4 WHEN RECORDER,

CONTROLLER, ETC. IS USED.

FIGURE 3

ELECTRICAL CONNECTIONS FOR WATER TIGHT AND EXPLOSION PROOF ENCLOSURES,

MODELS 158A – ( ) ( ) – (A, B, C, D) ( ).

MODEL 158A 909GF197B

- 9 -

FIGURE 4

MOUNTING DIMENSIONS FOR LARGE WEATHERPROOF ENCLOSURE WITH INDICATOR (USED WITH

OPTIONAL ALARMS) MODEL 158A – ( ) ( ) – E ( ).

MILLIMETER

INCH

SEE FIGURE 5 FOR DIMENSIONS OF PROBE

MOUNTED CONDUIT OUTLET BOX.

MODEL 158A 909GF197B

- 10 -

FIGURE 6

ELECTRICAL CONNECTIONS FOR LARGE WEATHERPROOF ENCLOSURE,

MODEL 158A

–

(

)

(

)

–

(

)

FIGURE 5

DIMENSIONS OF PROBE MOUNTED CONDUIT OUTLET BOX SUPPLIED WITH TRIAX CABLE.

(TRIAX CABLE ORDERED SEPARATELY)

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