Robertshaw Stud Sensor 158A Manuel D’Utilisation
MODEL 158A
909GF197B
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2
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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
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.
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.
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.
indicator.
Meets NEMA Type 4 and CSA
Enclosure 5.
B
Water tight housing with indicator.
Meets NEMA Type 4 and CSA
Enclosure 5.
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.
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.
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.
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
2
¾Alarm Relays for High or Low
Alarm.
Alarm.
3
¾Alarm Relays for High and Low
Alarms.
Alarms.
¾ May only be used with Designation E on
Table
Table
3.