6-25
T -296
NOTE
Use chart CTD P/N 09-00128-00 (°F)
P/N 09-00128-01 (°C).
a. Press the “Calibration” button (item 7, Figure 6-31)
on the bottom of the recorder. The pen tip will drive
fullydownscale,thenmoveupscaletothechartring
at 0°C(32°F), and stop.
b. Ifthetipofthepen(item4)isonthe0°C(32°F)chart
ring therecorder is in calibration, proceed to step c.
If the tip of the pen is NOT on the 0°C(32°F) chart
ring,theoperatormustloosenthetwoscrewsonthe
bottom of the stylus arm to adjust the pen tip
manually to the 0°C(32°F) chart ring. Tighten the
screws when adjustment is complete.
c. Pressthecalibrationbuttonandthepenwillposition
itself to the correct temperature reading.
For Electronic Partlow Recorder CTD P/N
12-00464-02:
NOTE
Use only the customer specific chart, contact
the unit owner for supplies.
a. Press the “Calibration” button (item 7, Figure 6-31)
on the bottom of the recorder. The pen tip will drive
fullydownscale,thenmoveupscaletothechartring
at --30°C(--22°F), and stop.
b. If the tip of the pen (item 4) is on the --30°C(--22°F)
chart ring the recorder is in calibration, proceed to
step c. If the tip of the pen is NOT on the --30°C
(-- 22°F)chart ring, theoperatormustloosenthetwo
screws on the bottom of thestylus armto adjustthe
pen tip manually to the --30°C(--22°F) chart ring.
T ighten the screws when adjustment is complete.
c. Pressthecalibrationbuttonandthepenwillposition
itself to the correct temperature reading.
6.23 MECHANICAL PARTLOW TEMPERATURE
RECORDER
CAUTION
The inside mechanism of the recorder,
particularly the inside of the element
housing should never be oiled, however,
control mechanisms should be sprayed
periodically (every 60 days) with corrosion
inhibiting CRC 3-36a or 6-66 or LPS no. 2.
NOTE
The Controller/DataCORDER air temperature
sensor is located adjacent to the temperature
recorder bulb, and can be used to calibrate the
recorder.
6.23.1 Checking The Temperature Recorder
The temperature recorder may be fitted with a
thermistorprobe(Simpsonaccessory#344)attachedat
the recorder bulb. The thermistor wiring is brought from
the bulb location to a receptacle located in the chart
platen of the recorder. If a thermistor is provided, the
recorder chart reading may be checked using a
temperature tester as described in step a . If a
thermistor is not fitted, check the recorder chart reading
using an ice and water bath as described in step b.
Table 6-2 Temperature-Resistance Chart
RESISTANCE
TEMPERATURE
(Ohms) °
°°
°F °
°°
°C
12561.00 -- 10 --23.3
10579.70 --5 --20.6
8944.17 0 --17.8
7588.89 5 --15.0
5520.32 15 --9.4
4731.71 20 --6.7
4068.68 25 --3.9
3509.36 30 --1.1
3310.57 32 0
3035.99 35 1.7
2634.10 40 4.4
2291.85 45 7.2
1999.52 50 10.0
1749.11 55 12.8
1534.00 60 15.6
1348.72 65 18.3
1050.14 75 23.9
929.87 80 26.7
825.21 85 29.4
733.93 90 32.2
654.12 95 35.0
584.19 100 37.8
522.79 105 40.6
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