Ecom Instruments PTC 400 User manual

Bedienungsanleitung
Instruction Manual
Manuel d’Instructions
PTC 400

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Contents Page
1. Introduction 10
2. Quick Start Instructions 10
A. Key Functions 10
B. Setpoints 10
3. Connection Diagrams & Instructions 12
A. Sourcing Resistance 12
B. Sourcing a Thermocouple Signal 12
C. Measuring Temperature Using a Thermocouple 12
D. Measuring Resistance (RTDs) 12
E. Sourcing Resistance (RTDs) 13
4. Maintenance 14
A. Power Requirements 14
B. Calibration 14
5. Specifications 14
6. Repair 16
7. Warranty and liability 16

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1. Introduction
The PTC 400 is designed to be a versatile, easy to use temperature calibrator with a simple
user interface. The following instructions will allow the user to begin simple calibration tasks by
learning the basic operation of the keys and their functions.
2. Quick Start Instructions
A. Key Functions
Key Function
Input/Output Toggles the function selected from measurement mode to source mode.
TC Pressing the “TC” or “Thermocouple” key toggles through all available TC
types as well as direct mV output.
RTD Pressing the RTD key toggles through all available RTD types as well as
direct ohms output.
°F/°C Toggles between °F and °C
0-9 keys These keys allow a user to enter an output value.
Example: to output 20 mV select mV output and Press the “2” key then
the “0” key followed by the “ENTER” key.
Arrow  These keys allow small changes to be made to an output value. Press
either the up or the down key to set the value as desired.
CE The clear entry key allows the user to clear a value before the enter key is
pressed.
Shift This key has a blue text color and acts as a second function key to all
keys that have an associated second function.
B. Setpoints
1. Storing Setpoints
The setpoint mode allows up to 9 setpoints to be set in non-volitile memory for each range.
The procedure is as follows:
a. Set the output to the desired value.
b. Press shift followed by the “SET” key
c. Choose the desired setpoint storage location by pressing a key (1-9).
d. Enter a new value and repeat steps 1 through 3 as needed, up to 9 setpoints for each
range can be stored.
2. Recalling Setpoints
a. To recall a setpoint press shift followed by the”SPT” key.
b. You will be prompted to enter the number of the desired setpoint location set previously.
c. Press the desired location number and the unit will go to that output.

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3. Automated Stepping
The PTC 400 can auto-step through some or all of the stored setpoints for a given range.
The procedure is as follows:
a. Press “Shift” followed by “Auto”.
b. “Auto SPT ?” will appear. Enter the ending setpoint location. Example: if you have all 9
setpoints stored but only want to step through the first 3 then enter ”3” for this question.
c. The next screen prompts you to enter the dwell time from 5 to 500 seconds.
Simply enter a number in that range.
d. Auto-step will begin.
e. To exit auto-step press the “CE” key or enter a value.
4. Manual Stepping
The PTC 400 can be manually stepped through all or some of the stored setpoints.
The procedure is as follows:
a. Press “Shift” followed by “Man”
b. Using the arrow keys, toggle up and down through the stored setpoints.
c. To exit press “CE” or simply enter a new output value.
PRECISION TEMP CALIBRATOR

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3. Connection Diagrams & Instructions
A. Sourcing Resistance
1. Select the RTD mode.
2. Connect device under test as shown.
3. In the RTD mode, use the RTD key to choose the desired range.
4. The PTC 400 is able to handle up to a 3 mA excitation on the Resistance Simulation Range.
Exceeding these limits will result in a warning on the display.
Figure 1.
B. Sourcing a Thermocouple Signal
TC wire must be used to achieve an accurate calibration.
Figure 2.
Note: For best accuracy allow a 10 minute warm-up period after the PTC 400 is turned on.
C. Measuring Temperature Using a Thermocouple
Figure 3.
D. Measuring Resistance (RTDs)
When measuring resistance (ohms) there are 3 choices when using the PTC 400. The choices
are 2-wire, 3-wire, and 4-wire measurements. While 4-wire offers the highest accuracy, most
industrial RTDs are a balance 3-wire. Figure 4 shows how to hook up the PTC 400 for the 3
types of measurements.
1. Choose the desired RTD/ohms range by first pressing the “RTD” key to get into the RTD mode.
Continue to press the “RTD” key to step through all of the RTD choices.

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2. Make sure the PTC 400 is in the Input Mode
(Note: that it will indicate 2, 3, or 4W in the upper left corner of the LCD).
To set the desired wire configuration use the Up/Down arrow keys to toggle through the 2,
3, and 4 wire modes.
Measuring a 2 Wire RTD or Using the Continuity Function
Measuring a 3 Wire RTD
Measuring a 4 Wire RTD
Figure 4.
E. Sourcing Resistance Into a RTD Transmitter
1. As described previously in section A the PTC 400 can source resistance in a RTD Transmitter
or measuring device. In many cases the unit under test will require a 3 or 4 wire connection to
achieve best accuracy. Refer to Figure 5 for connection information.
Figure 5.

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4. Maintenance
A. Power Requirements
The PTC 400 operates on 4 AA alkaline batteries or optional rechargeable Ni-Cd batteries. To
replace the alkaline batteries or to install rechargeable batteries remove the two (2) screws on
the rear battery door and lift the battery cover. When using Ni-Cd batteries the AC adapter will
simultaneously power the PTC 400 and charge the batteries. A full charge will take 10- 12 hours.
The AC adapter can be used to power the unit on the bench with or without Ni-Cd batteries
installed. Never connect the AC adapter with alkaline batteries installed, be sure to remove the
alkaline batteries before using the AC adapter.
B. Field Replacement Fuse Update
PTC 400s come with a field replaceable minifuse. This fuse protects the PTC 400 from mis-
connections beyond the ratings specified for the PTC 400 inputs and outputs. If an overload
condition occurs and a blown fuse is suspected perform the following fuse check/replacement
procedure:
1. Remove the four screws on the rear of the PTC 400 that hold the enclosure together.
NOTE: Two of the screws are under the battery compartment door.
2. With the case top open, locate the two socketed mini fuses mounted near the input/output
connection jacks.
3. Remove one fuse at a time and check continuity using an ohmmeter. A good fuse will read
10 ohms or less. A blown fuse will have a very high reading and generally show as an open
circuit.
4. If a blown fuse is found replace with the enclosed spare fuse.
5. To order more fuses contact ecom instruments GmbH.
C. Calibration
The PTC 400 should hold its rated specifications for a minimum of one year. Given this, annual
re-calibration is required for best performance.
5. Specifications
T/C Ranges: J, K, T, E, R, S, N, B, L, U including – 10 to 75 mV range
RTD Ranges: Pt 385 (100, 200, 500, 1000 ohms)
Pt 392, JIS, Ni 120, CU10, YSI 400
Ohms Ranges: 0 to 400.00 and 400.0 to 3200.0
Accuracy: T/C Type J: ±0.3°C ±10 µV (±0.4°C total error)
RTD PT100: ±0.1°C ±0.075 Ω (±0.3°C total error)
Ohms (400): ±0.1 Ω
Ohms (3200): ±1.0 Ω
RTD IEX-range: 0.01 mA to 3 mA
RTD Frequency Response: 10 mS – works with all pulsed XMTR’s
Oper. Temp: -10°C to 50°C
Storage Temp: -40°C to 60°C
Power Supply: 4 AA Alkaline Cells, 30 hours typical operating time
Size: 7.5“ x 4“ x 1.5“ (190 x 102 x 38 mm)

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Range & Accuracy
Range Min Max Accuracy
ohms Read (low) 0.00 Ω 400.00 Ω ± 0.1 Ω
ohms Read (high) 400.0 Ω 1500.0 Ω ± 0.5 Ω
1500.0 Ω 3200.0 Ω ± 1.0 Ω
Range Min Max Excitation Current Accuracy
Ohms Source (low) 5.00 Ω 400.00 Ω 0.1 to 0.5 mA 0.15 Ω
5.00 Ω 400.0 Ω 0 0.5 to 3 mA 0.1 Ω
Ohms Source (high) 400.0 Ω 1500.0 Ω 0.05 to 0.8 mA 0.5 Ω
1500.0 Ω 3200.0 Ω 0.05 to 0.4 mA 1.0 Ω
Thermocouple Read and Source (All errors included)
Range in °C Min Max Accuracy
J Thermocouple -200.0 0.0 0.6°C
0.0 1200.0 0.4°C
K Thermocouple -200.0 0.0 0.8°C
0.0 1370.0 0.5°C
T Thermocouple -200.0 0.0 0.8°C
0.0 400.0 0.5°C
E Thermocouple -200.0 0.0 0.5°C
0.0 950.0 0.4°C
R Thermocouple -20 0.0 2.4°C
0 500 1.7°C
500 1750 1.3°C
S Thermocouple -20 0 2.4°C
0 500 1.7°C
500 1750 1.4°C
B Thermocouple 600 800 2.1°C
800 1000 1.7°C
1000 1800 1.3°C
L Thermocouple -200 0.0 0.45°C
0.0 900.0 0.4°C
U Thermocouple -200 0.0 0.7°C
0.0 400.0 0.45°C
N Thermocouple -200 0.0 1.1°C
0.0 1300.0 0.6°C
mV Read/Source -10.00 75.00 0.015 % ± 2 dig.

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RTD Read and Source
Range in°C Min Max Accuracy
Ni120 (672) -80.0 260.0 0.2°C
Pt100 (385) -200.0 800.0 0.33°C
Pt100(3926) -200.0 630.0 0.3°C
Pt100(3916) -200.0 630.0 0.3°C
Pt200(385) -200.0 630.0 0.8°C
Pt500(385) -200.0 500.0 0.3°C
500.0 630.0 0.4°C
Pt1000(385) -200.0 100.0 0.2°C
100.0 630.0 0.3°C
Cu10 -100.0 250.0 2.2°C
YSI400 15.00 50.00 0.05°C
6. Repairs
Repair work is subject to the nationally valid regulations and directives. We therefore recom-
mend that such work be performed by ecom instruments GmbH, Germany, as all repairs must
be examined to ensure functional safety.
7. Warranty and liability
Under the general terms and conditions of business, ecom instruments GmbH offers a 2-year
warranty for function and materials on this product under the specified operating and mainte-
nance conditions. Not covered are all wearing parts (e.g. batteries, sensors, displays, lamps,
etc.) as well as calibrations.
This warranty does not extend to products that have been used improperly, altered, neglected,
damaged by accident or subjected to abnormal operating conditions or improper handling. In
the event of a warranty claim, the faulty device should be sent in. We reserve the right to read-
just, repair or replace the unit.
The above warranty terms represent the sole rights of the purchaser to compensation and
apply exclusively and in place of all other contractual or statutory warranty obligations. ecom
instruments GmbH does not accept liability for specific, direct, indirect, incidental or conse-
quential damages or losses, including the loss of data, regardless of whether they are caused
by breach of warranty, lawful or unlawful actions, actions in good faith or other actions.
If in certain countries the restriction of statutory warranty and the exclusion or restriction of in-
cidental or consequential damages is unlawful, then it may be possible that the above restric-
tions and exclusions do not apply for all purchasers. If any clause in these warranty terms
should be found to be invalid or unenforceable by a competent court, then such a judgement
shall not affect the validity or enforceability of any other clause contained in these warranty
terms.

ecom instruments GmbH
Industriestr.2
D-97959 Assamstadt
Tel.: [phone] / 42 24-0
Fax: [phone] / 42 24-90
E-Mail: [email protected]
Internet: www.ecom-ex.com
5400 AL 01 A00 10/05 Änderungen vorbehalten! Subject to change without notice!