CUB5RTR0【PDF 8/12 页】RTD METER REFLECTIVE

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6.2 MODULE 2 - S ECONDARY F UNCTION P ARAMETERS ( 2-SEC )

2-SEC

SEL

PARAMETER MENU

Pro

HI-En

Max Display

Enable

HI-t

Max Capture

Delay Time

LO-En

Min Display

Enable

LO-t

Min Capture

Delay TIme

FCS

Factory

Service

CodE

Access Code

For Service

MAX DISPLAY ENABLE

Operations

CALIBRATION

HI-En ?

NO YES

? NO

Enables the Maximum Display Capture capability.

CodE

The CUB5RT uses stored resistance calibration values

to provide accurate temperature measurements. Over

time, the electrical characteristics of the components

inside the meter could slowly change. The result is that

the stored calibration values may no longer accurately

define the input circuit. For most applications, recalibration every 1 to 2 years

should be sufficient.

HI-t ? 0.0

LO-En ?

MAX CAPTURE DELAY TIME

to 999.9 seconds

? 2.0

When the Input Display is above the present MAX value for the entered

delay time, the meter will capture that display value as the new MAX reading.

A delay time helps to avoid false captures of sudden short spikes.

MIN DISPLAY ENABLE

NO YES

? NO

Enables the Minimum Display Capture capability.

MIN CAPTURE DELAY TIME

Calibration of the CUB5RT involves a resistance calibration. Allow 30

minute warm up before performing any calibration related procedure. The

following procedures should be performed at an ambient temperature of 15 to

35 °C (59 to 95 °F).

Calibration should only be performed by individuals experienced in

calibrating electronic equipment.

CAUTION : The accuracy of the calibration equipment will directly affect the

accuracy of the CUB5RT.

10 OHM RTD Range Calibration

1. Set the Input Range Jumper to 10 ohm.

2. With the display at CodE 48 , press and hold the SEL button for 2 seconds. Unit

will display CAL NO .

3. Press the RST button. Display reads CAL r10 .

4. Press the SEL button. Display reads 00r .

5. Apply a direct short to terminals INP+, EXC, and COMM using a three wire

link. Press SEL . Display reads CALC for about 15 seconds.

6. When the display reads 15.0r , apply a precision resistance of 15 ohms (with an

accuracy of 0.01% or better) to terminals INP+, EXC, and COMM using a

three wire link. Press SEL . Display reads CALC for about 15 seconds.

7. When display reads CAL NO , press the SEL button to exit calibration, or

proceed to the 100 ohm RTD Range Claibration.

LO-t

2.0

0.0

999.9 seconds

100 OHM RTD Range Calibration

1. Set the Input Range Jumper to 100 ohm.

When the Input Display is below the present MIN value for the entered delay

time, the meter will capture that display value as the new MIN reading. A delay

time helps to avoid false captures of sudden short spikes.

FACTORY SERVICE OPERATIONS

2. With the display at CodE 48 , press and hold the SEL button for 2 seconds. Unit

will display CAL NO .

3. Press the RST button until the display reads CAL r100 .

4. Press the SEL button. Display reads 0.0r .

5. Apply a direct short to terminals INP+, EXC, and COMM using a three wire

link. Press SEL . Display reads CALC for about 15 seconds.

6. When the display reads 300.0r , apply a precision resistance of 300 ohms (with

an accuracy of 0.01% or better) to terminals INP+, EXC, and COMM using

FCS

yES

a three wire link. Press SEL . Display reads CALC for about 15 seconds.

7. When display reads CAL NO , press the SEL button to exit calibration.

Select YES to perform any of the Factory Service Operations shown below.

RESISTANCE DISPLAY MODE

CodE ?

CodE

? 85

RESTORE FACTORY DEFAULT SETTINGS

Entering Code 66 will overwrite all user settings with

the factory settings. The meter will display rESEt and then

66 return to CodE 00 . Press SEL button to exit the module.

Pressing both the SEL and the RST button on power-up

will also load the factory settings and display rESEt . This allows operation in

the event of a memory failure or corruted data.

Entering Code 85 will place the CUB5RT in a resistance

display mode. This mode is useful for diagnostic purposes

before and after calibration, or to display the measured

resistance of a connected RTD probe. If the RTD type is set

for Cu427 with the jumper set to the 10 ohm position, the display will read

resistance in 0.000 ohms resolution. For all other RTD types, with the jumper in

the 100 ohm position, the display will read in 0.00 ohms resolution.

Re-entering code 85 toggles the display back to the temperature display mode

without having to remove power from the meter. If power is removed, the

display always returns to the temperature display mode when power is reapplied.

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