Michell Instruments PC33, Руководство пользователя

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PC33 & 52 User’s Manual
6 97238 Issue 2, October 2013
CALIBRATION
3.2 Calibration & Adjustment for 2% Accuracy (2 pt Adjustment)
PC52
1. Remove the screw at the side of the connector.
2. Carefully unscrew the sensor protection cap from the head.
dO nOT TOUCH THE SEnSOR ELEMEnT
(see 5 below)
3. Carefully remove the circuit board from the body by pulling on the
threaded end while holding the tube.
• The transmitter should be calibrated at two points, one low (Zero)
and one high (Span) point.
• Once the first low value is reached and the reading of the reference
is stabilized, adjust the transmitter with the Zero RH potentiometer
(see 1 below). Compare with the reference.
• After the second high value is reached and stabilized, adjust with
the Span RH potentiometer (see 2 below).
• For versions with a T output this procedure should be repeated
with a temperature potentiometer (see 3 and 4 below) only use
the “Zero temp” potentiometer to adjust the temperature readings.
See Figure 7 for 2-wire V DC power supply, output 4-20 mA and Figure 8 for 3/4-wire
V DC power supply voltage, output 0 to 1, 0 to 5 or 0 to 10 V.
2-wire (mA)
1 2 3
4
   
5


PIN 1 WHITE
PIN 3 BROWN
PIN 4 GREEN
PIN 2 YELLOW
CONNECTIONS
RH
-
T
-
CONNECTOR CABLE
TEMPERATURE RAnGE
INPUT j2 j3
0 to +50°C
(+32 to +122°F)

0 to +100°C
(+32 to +212°F)
-20 to +80°C
(-4 to +176°F)


Soldered joint
Figure 6
PC52 - 2-wire Connection