Red-lion CUB5TC Bedienungsanleitung PDF herunterladen (Seite 8)

5.2 Module 2 - Secondary function paraMeterS (2-SEC)

SEL

Max Capture

Delay Time

Max Display

Enable

Min Display

Enable

Access Code

For Service

Operations

Min Capture

Delay TIme

Factory

Service

Operations

2-SEC

HI-En HI-t

LO-En LO-t FCS

CodE

Pro

PARAMETER MENU

MIN DISPLAY ENABLE

YESNO





2.0

HI-t





LO-En





FCS

MAX CAPTURE DELAY TIME

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.





2.0

LO-t

MIN CAPTURE DELAY TIME

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.

0.0 to 999.9 seconds





HI-En

MAX DISPLAY ENABLE

0.0 to 999.9 seconds

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

FACTORY SERVICE OPERATIONS

yESNO

YESNO

Enables the Maximum Display Capture capability.

Enables the Minimum Display Capture capability.

The CUB5TC uses stored voltage calibration and cold

junction temperature values to provide accurate temperature

and voltage 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.

Calibration of the CUB5TC involves a voltage calibration and a cold

junction calibration. It is recommended that both calibrations be performed.

The voltage calibration MUST precede the cold junction 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 CUB5TC.

Input Voltage Calibration

1. Connect a precision DC voltage source with an accuracy of 0.01% or better

to the TC+ (positive) and the TC- (negative) terminals of the CUB5TC. Set

the output of the voltage source to zero.

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 to select INP.

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

5. With the voltage source set to zero, press SEL. Display reads CALC for about

eight seconds.

6. When display reads 60.0u, apply 60.000 mV input signal. Press SEL. Display

reads CALC for about eight seconds.

7. When display reads CAL NO, press SEL twice to exit Module 2 and return to

the normal display mode.

8. Proceed to Cold Junction Calibration.

Cold Junction Calibration

1. Install all option cards needed for your application and the rear cover,

or invalid results will occur.

2. The ambient temperature must be within 20°C to 30°C.

3. Connect a thermocouple (types T, E, J, K, or N only) with an accuracy of 1°C

or better to the meter.

4. Enter programming mode and verify the following settings in Module 1:

tYPE = thermocouple type connected to the unit

CJC = YES; SCALE = °C; dECPt = 0.0; OFSEt = 0

5. Place the thermocouple in close thermal contact to a reference thermometer

probe. (Use a reference thermometer with an accuracy of 0.25°C or better.)

The two probes should be shielded from air movement and allowed sufficient

time to equalize in temperature. (A calibration bath of known temperature

could be used in place of the thermometer.)

6. Compare the unit display with the reference temperature indicator (or

calibration bath). If a difference of more than ±1.0 °C exists, note the

difference (CJ error) and continue with cold junction calibration.

CJ Error = Reference Temperature - Unit Display.

7. Enter programming mode. Step through Module 2 to the Service Access

Code parameter and select CodE 48. Press and hold the SEL button until the

unit displays CAL NO. Press the RST button to select CJC.

8. Press SEL. Display reads CJC followed by the current cold junction value.

Calculate a new cold junction value as follows:

New cold junction = Current cold junction + CJ Error (noted above)

9. Press RST and set the display to the new cold junction value. Press and hold

SEL. Display reads CALC for about four seconds and then returns to CAL NO.

10. Press SEL twice to exit calibration and return to the normal display mode.

Verify the input reading is correct. If not, repeat steps 6 through 10.

CALIBRATION





CodE

RESTORE FACTORY DEFAULT SETTINGS

Entering Code 66 will overwrite all user settings with

the factory settings. The meter will display rESEt and then

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.

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

CodE

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