COMECO H5700 Manual de instrucciones - Página 2

Navegue en línea o descargue pdf Manual de instrucciones para Termómetro COMECO H5700. COMECO H5700 2 páginas. Single-channel programmable thermometer
También para COMECO H5700: Manual de instrucciones (2 páginas)

Imprimir página

OPERATING

Input sensors and ranges

The device operating ranges depending on the type of the connected temperature sensor are shown in Table 1.

SENSOR TYPE

Thermoresistance Pt 1000

Thermocouple Fe-CuNi (type "J")

Thermocouple NiCr-Ni (type "K")

Thermocouple PtRh-Pt (type "S")

Control keys

The device is controlled via three keys. The right key (

mode, as well as for confirming selected value during thermometer adjustment. The middle key (

serves for alternation of the "accuracy" (resolution) between without decimal part and with one digit after the decimal point.

In adjustment mode, the same key serves for selection and change of the adjusted parameter. The left key (

alternation of the input channels (in measurenet mode) and for changing parameter values during adjustment.

Turning on and off

Press the

key once. The test string 88*8 appears on the display and the device enters measurement mode.

One measurement cycle lasts approximately half a second and the display readings refresh after its end. While the device is in

measurement mode, you can turn it off by pressing the

"Accuracy" (resolution) selection

While the device is in measurement mode, use

temperature. The readings can be displayed either as whole numbers or as numbers with one digit after the decimal point.

After pressing the key, read for half a second respectively

Notes:

1. Because the device display is 4-digit, temperatures below -99.9° and above 999.9° are always displayed as whole numbers.

2. If the resolution is "whole number", H5700 will round off the readings with decimal part greater than or equal to 0.5° (e.g., if

the measured temperature is 342.7°, the device will indicate 343).

3. After recovery from power supply failure (for example, due to battery replacement), the thermometer will display the readings

with resolution "whole number" until the other resolution is selected.

4. When the input is from thermocouple type "S", the readings are always whole numbers!

Input channel selection

H5700 can measure the temperature of the 1

channel (Т1) or the temperature of the 2

For channel selection mode use

. Press once to view the active channel or hold to change channel mode. If first channel

has been selected, the device will indicate CH 1; if the second channel has been selected, the device indicates CH 2; in

case of differential mode H5700 will indicate d1FF.

Note: After power on H5700 will enter in CH 1 measurement mode by default.

SENSOR FAILURE INDICATION

When the measured value is outside the input nominal range, which happens usually as a result of sensor failure or destroyed

connection (sensor break, short circuit), the SEn message appears on the display. Check the condition of the sensor and its

connections.

OPERATING RANGE

-100÷660°C (-148÷1220°F)

-100÷1200°C (-148÷2192°F)

-100÷1300°C (-148÷2372°F)

0÷1700°C (32÷3092°F)

) serves for turning H5700 on and off while it is in measurement

) in measurement mode

key. The thermometer indicates 0FF and turns itself off.

to alternate the resolution with which H5700 indicates the measured

0 or

)0.

channel as well as the difference (Т1-Т2).

ADJUSTING

Use the adjustment mode to set the parameters auto-power-off time, offset, measuring units and sensor type (only for H5700

with programmable input). To enter this mode, press

Table 1

adjusted: 0FSt (offset), Un1t (measuring units), toFF (auto-power-off time), or StYP (sensor type). Use

to select a parameter. Confirm with

Auto-power-off adjustment

The toFF parameter defines the time between the moment a key has been pressed for the last time and the moment the device

turns itself off automatically. The auto-power-off time is user-selectable in the range from 0 to 30 min. at intervals of 5 min. While

H5700 is in adjustment mode, select the "auto-power-off time" parameter with

Read the last parameter value on the display. Use

the changes by pressing

Offset adjustment

) is used for

Use the 0FSt parameter to offset linearly the device scale. While H5700 is in adjustment mode, select the "offset" parameter

with

and confirm it with

Use

to select the desired digit and

pressing

. To exit without saving the changes, press

Note: The offset programming can be done for the selected input channel, but not for the temperature difference mode!

In such case an error message will be displayed!

Measurement units

H5700 can display temperature in degreed Celsius or Fahrenheit. While H5700 is in adjustment mode, select the "units" parameter

(Un1t) with

selection by

. To exit without saving the changes, press

Note: After power on H5700 will measure temperature in .C by default.

Sensor selection

H5700 with programmable input can operate with any of the following sensors: Pt1000, thermocouples type "J", "K", and "S".

To set the sensor type, while the device is in adjustment mode, use

Confirm it with

. Select sensor type: tYPt (Pt1000), tY ] (T/C "J"), tY " (T/C "K"), or tY 5 (T/C "S").

Confirm the selection with

Note: 1. The sensor programming can be done for the selected input channel, but not for the temperature difference mode!

In such case an error message will be displayed!

2. If no key has been pressed for more than 5 sec., the device automatically returns to measurement mode without saving

the changed parameter values.

LOW BATTERY INDICATION

H5700 monitors the battery voltage, and when it drops bellow the critical (approx. 2.2V), each 10 sec. the device displays

bAtt for about half a second. Replace the battery.

and

simultaneously. Read on the display the parameter to be

to increase and

to decrease the value at intervals of 5 min. Confirm

. To exit without setting (confirming) the new value, press

. Read the last parameter value on the display. The digit to be adjusted flashes.

to change its value. The last digit is the sign digit. Confirm the changes by

and

simultaneously.

select °C (

and confirm with

. Using

and

simultaneously.

or exit without confirming by pressing

and

and confirm it with

and

simultaneously.

.C) or °F (

.F) and confirm your

to select the "sensor type" parameter (StYP).

simultaneously.