8-2
MODEL 54 C
SECTION 8
DESCRIPTION AND ORDERING INFORMATION
8.2 PHYSICAL SPECIFICATIONS - GENERAL
Enclosure:
Epoxy-painted cast aluminum
NEMA 4X (IP65)
144 X 144 X 132mm, DIN size
(5.7 X 5.7 X 5.2 in.)
Front Panel:
Membrane keyboard with tactile feed
back and user selectable security. Light gray, blue
and white overlay. Light gray enclosure, dark gray
bezel.
Display:
Dot matrix LCD (7.0 x 3.5 cm), blue on gray-
green. The display contrast is compensated for
ambient temperature.
Process Variable Character Height:
16mm (0.6 inch)
Electrical Classification:
Group I Panel Mount Enclosure:
FM
Class I, Div. 2, Group A thru D.
Relays: 28 Vdc - 5.0 amps resistive only
150 mA - Groups A & B; 400 mA - Group C;
540 mA - Group D; Ci = 0; Li = 0
CSA Class I, Div. 2, Group A thru D.
28 Vdc, 110 Vac & 230 Vac relays
6.0 Amps resistive only
Power:
100 - 127 VAC, 50/60 Hz ± 6%, 6.0 W
200 - 253 VAC, 50/60 Hz ± 6%, 6.0 W
Current Outputs:
Output 1: Conductivity
Output 2: Conductivity or temperature
Each output is galvanically isolated, 0-20 mA or
4-20 mA into 600 ohms maximum load at
115/230 Vac
or
550 ohms maximum load at
100/200 Vac
EMI/RFI :
EN50081-2
EN50082-2
LVD :
EN61010-1
Ambient Temperature:
0 to 50°C (32 to 122°F)
NOTE: The analyzer is operable from -20 to 60°C
(-4 to 140°F) with some degradation in display
performance.
Relative Humidity:
95%, non-condensing
Alarms:
Relay 1 - Process alarm
Relay 2 - Process alarm
Relay 3 - Process alarm or timer
Relay 4 - Fault alarm
Each relay has a dedicated LED on the front panel.
Relay Contacts:
Relays 1-3: Epoxy sealed form A
contacts, SPST, normally open.
Relay 4: Epoxy sealed form C, SPDT.
Resistive
Inductive
28 Vdc
5.0 Amps
3.0 Amps
115 Vac
5.0 Amps
3.0 Amps
230 Vac
5.0 Amps
1.5 Amps
Weight/Shipping Weight:
1.1 kg/1.6 kg (2.5 lb/3.5 lb)
INSTRUMENT SPECIFICATIONS @ 25°C
Measurement Range:
–15 to 200°C (5 to 392°F)
Accuracy:
± 0.5% of reading
Repeatability:
± 0.25% of reading
Stability:
± 0.25% of output range/month, noncumula-
tive
Ambient Temperature Coefficient:
± 0.01% of read-
ing/°C
Temperature Compensation:
-15 to 200°C (5 to 392°F)
(automatic or manual)
Temperature Slope Adjustment:
0-5% / °C
RECOMMENDED SENSORS:
Model 140 Retractable Conductivity
Model 141 Insertion Conductivity
Model 142 Insertion Conductivity
Model 150 Insertion/Submersion Conductivity
Model 222 Toroidal Conductivity
Model 225 Toroidal Conductivity
Model 226 Toroidal Conductivity
Model 228 Toroidal Conductivity
Model 400 Screw-in Conductivity
Model 401-14 Screw-in Conductivity
Mode 402 Retractable Conductivity
Model 403 Conductivity with Sanitary Fitting
The Model 54C
is compatible with both contacting and inductive (toroidal) conductivity sensors and measures
over the range of 0-1 µS/cm to 0-2,000 mS/cm. Inductive conductivity sensors have no electrodes exposed to the
measured solution, which practically eliminates routine sensor maintenance. The analyzer features a 0-5%/°C
temperature slope adjustment. Temperature slope may be adjusted to provide greater accuracy in chemical con-
centration control. The temperature slope is factory set at 2% as a representative value, but each conductive solu-
tion has its own set of temperature vs. concentration curves. The Model 54C will automatically calculate the
temperature slope for any given solution, or permit manual adjustment of the temperature slope if already known.
The analyzer will also automatically correct for cell constant variations for better measurement accuracy.
Summary of Contents for 54C
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