Siemens Pacemaker UM344-2 Instrukcja Użytkownika Pobierz pdf (Strona 112)

CALIBRATION AND MAINTENANCE UM344-2

September 1995

2) Disconnect the test resistance decade box and connect the test millivolt source to the transmitter.

See Figure 6-4.

3) Turn ON the power supply and proceed to section 6.1.4.2 and perform the Narrow/Wide Millivolt

calibration procedures.

6.1.4 Thermocouple/Millivolt Type Input Calibration

The calibration check consists of substituting a millivolt source for a thermocouple (TC) or mV (slidewire

potentiometer) type sensor. Millivolt values corresponding to Zero and Full Scale temperatures are applied

to the transmitter and the indicated output checked for accuracy.

Narrow/Wide Millivolt calibration consists of applying one low and one high millivolt signal to the

transmitter and entering them into EPROM.

Narrow Millivolt: Applicable to mV inputs between -11.00 to +26.00 millivolts including inputs from an

R, S, T, or B type thermocouple.

Wide Millivolt: Applicable to mV inputs between -18.00 to +103.00 millivolts including inputs from a

J, K, E, or N type thermocouple.

6.1.4.1 Thermocouple/Millivolt Calibration Check

1. Connect test equipment to transmitter as shown in Figure 6-4.

FIGURE 6-4 TC/mV Input Accuracy Check and Calibration Set Up

Bench Power

Supply (DC)

Millivolt

Source

250

MXC

Signal

Test

X02827S1 2 of 2

2 3

Model 344

Terminals

DVM

1 2 ... 107 108 109 110 111 112 113 114 115 116 117 ... 182 183

Brak uwag

Siemens Pacemaker UM344-2 Instrukcja Użytkownika Strona 112