ZCT 777 works either on the magnetic induction principle or on the eddy current principle, depending on the type of probe
used. You can select the type of probe via MENU system, or it will be work automatically.
The gauges conform to the following industrial standards:
Measured Coatings: Non-magnetic coatings(e.g. paint, zinc)on steel; Insulating coatings(e.g. paint, anodizing coatings)on
no-ferrous metals
Operating with MENU easily
Two measuring modes: CONTINUE and SINGLE mode
Two working modes: DIRECT and GROUP mode(4 groups). DIRECT mode is intended for quick occasional readings.The
statistical analysis program can evaluate 80 readings. Unit values are not saved. In GROUP mode, every group memory can
store a maximum of 80 single readings, and 5 Statistic values.
Statistic Display: AVG, MAX, MIN, NO., S.DEV
One point calibrating and two points calibrating independently for each working mode
Zero calibrating easily
Memory for 320 readings(80 for each group)
Delete single readings and all group readings easily
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MEASUREMENT FOUNDATION
High alarm and Low alarm for all working modes
Low battery indication
Error indication
USB interface for PC analysis software
Disable Auto-Power-off function via MENU setting.
Application
This compact and handy gauge is designed for non-destructive, fast and precise coating thickness measurement. The
principal applications lie in the eld of corrosion protection. It is ideal for manufacturers and their customers, for ofces
and specialist advisers, for paint shops and electroplaters, for the chemical, automobile, shipbuilding and aircraft industries and for light and heavy engineering.
The probe can work on both principles, magnetic induction and on the eddy current principle. One probe only is required
for coating measurement both on ferrous and non-ferrous metal substrates.
Probe
The Probe systems are spring-mounted in the probe sleeve. This ensures safe and stable positioning of the probe and
constant contact pressure. A V-groove in the sleeve of the probes facilitates reliable readings on small cylindrical parts.
The hemispherical tip of the probe is made of hard and durable material. Hold the probe by the spring mounted sleeve
and put on measuring object.
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MEASUREMENT FOUNDATION
Specications
Sensor probeFN
Working principlemagnetic inductioneddy current principle
* micron 10-5 m
**measurements in bad conditions can lead to fail resalts or inability of getting results.
0°C-40°C
20%-90%
110 x 50 x 23
100
ZCT 777
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MEASUREMENT FOUNDATION
Features
11
12
13
6
15
16
17
23
NFe
ZCT 777
Probe
1.
Power On/Off
2.
10
9
8
7
14
5
4
1
Zero Calibration key
3.
Down/Right key
4.
Blue key for Esc/No/Back function in menu mode, or backlight On/Off in working mode
5.
Main display for coating thickness
6.
Measuring unit
7.
NFe: indicates readings on non-ferrous metals; Fe: indicates readings on ferrous metal
8.
Indicates the probe working principle: AUTO, Magnetic induction or Eddy current
9.
Indicates that the instrument is cureently controlled via PC
10.
USB connecting port
11.
Low battery indication
12.
Working mode indication: DIRECT or GROUP
13.
Statistic display: AVG, MAX, MIN, Sdev
14.
Stutistic number of measuring readings
15.
Red key for Ok/Yes/Menu/Select in menu mode
16.
Up/Left key
17.
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MEASUREMENT FOUNDATION
ZCT 777
Replacing the battery
1. Remove the screws from the battery compartment with a cross tip screwdriver.
2. Remove battery.
3. Insert new battery. Make sure the anode and cathode are correctly positioned.
4. Close the lid and fasten with screw.
Menu System and Basic Settings
Press button ON/OFF to power on; the gauge will work in measuring mode. Press red-bar button into MENU mode. See
following MENU system arranges:
NOTE: MENU system arranges need to be known well for your works.
To choose the parameter in the menu press RED BUTTON. To change the value of the parameter press buttons ▲/▼.
To conrm your choice press RED BUTTON. To cancel your choice press BLUE BUTTON.
To escape from the menu press BLUE BUTTON.
1.1 Average view
1 Statistic view
2 Options
1.2 Minimum view
1.3 Maximum view
1.4 Number view
1.5 Sdev. view
2.1 Measure mode
2.1.1 Single mode
2.1.2 Continuous mode
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MEASUREMENT FOUNDATION
2 Options
2.2 Working mode
2.3 Used probe
2.4 Unit settings
2.5 Backlight
2.6 LCD Statistic
ZCT 777
2.2.1 Direct
2.2.2 Group 1
2.2.3 Group 2
2.2.4 Group 3
2.2.5 Group 4
2.3.1 AUTO
2.3.2 Fe
2.3.3 No Fe
2.4.1 um
2.4.2 mils / mil
2.4.3 mm
2.5.1 ON
2.5.2 OFF
2.6.1 Average
2.6.2 Maximum
2.6.3 Minimum
2.6.4 Sdev
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MEASUREMENT FOUNDATION
ZCT 777
3 Limit
4 Delete
5 Measurement view
6 Calibration
2.7 Auto power off
3.1 Limit settings
3.2 Delete limit
4.1 Current data
4.2 All data
4.3 Group data
6.1 Enable
6.2 Disable
6.3 Delete Zero N
6.4 Delete Zero F
10
2.7.1 Enable / Вкл.
2.7.2 Disable / Выкл.
3.1.1 High limit / Верхняя граница
3.1.2 Low limit / Нижняя граница
MEASUREMENT FOUNDATION
ZCT 777
Measure modes (menu item 2.1)
Single mode (menu item 2.1.1: In Single mode, readings are accompanied by a bleep. All readings taken in this mode will
be automatically entered into the statistics program.
Continuous measurement mode (menu item 2.1.2): It can sometimes be of advantage if the probe does not need be raised
between each measurement so that there is a running display of readings. All readings taken in this mode will be automatically entered into the statistics program.
Measurement, storage and data processing in the DIRECT and GROUP modes (menu item 2.2).
DIRECT mode (menu item 2.2.1). DIRECT mode is intended for quick occasional readings. The statistical analysis program can evaluate 80 readings. The readings and statistical values can be shown on the LC display. When the memory is
full, new readings will replace old readings.
Note: in this mode unit values are not saved after the instrument is switched off.
GROUP mode (menu item 2.2.2-2.2.5). If you work in this mode the word “GROx” must appear on the display. Measure-
ments are saved in the free programmable memory. Every group memory can store a maximum of 80 single readings, and
5 Statistic values. When the memory is full, measuring will make sequentially, but not be stored and statistic values won’t
be changed. You will see indication of full memory “FULL” on the display.
If you want you can delete the group with data and values (menu item 4) and also zero the values of calibration (menu item 5).
Probe (menu item 2.3)
The probe can work in three modes.
AUTO (menu item (2.3.1): The probe can automatically select the working mode. When Placed on steel (magnetic substrates), it will work in magnetic induction principle. When placed on no-ferrous metals, it will work in eddy current principle.
Fe (menu item 2.3.2): The probe works in magnetic induction principle.
No-Fe (menu item (2.3.3): The probe works in eddy current principle.
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MEASUREMENT FOUNDATION
ZCT 777
Unit settings (menu item 2.4)
You can choose necessary unit: 10-3 vv (micron), mm.
In “um” mode, the unit will switch to “mm” automatically when value of reading exceeds 850um.
Backlight (menu item 2.5)
You can select ON/OFF in MENU system. Besides, in measuring mode, Press the
blue-bar button once to switch ON/OFF backlight.
LCD Statistic (menu item 2.6)
In Menu system mode, The statistic display can be selected between Average, Maximum, Minimum and Sdev. When return
to measurement mode, it will be displayed on the lover right of LCD. At the same time, the statistic number of measuring
readings is displayed on the lower left of LCD. Via “statistic view” item in MENU system, you can look through all statistic
values for current group.
Measurement Using Statistics
The gauge calculates statistics from a maximum of 80 readings. Readings can’t be stored in DIR mode. The following statistical values are calculated:
NO.: number of readings in Work Mode
AVG: average value
Sdev. : standard deviation
MAX: maximum reading
MIN: minimum reading
These data you can see in the menu Statistic view (menu item 1). Use buttons ▲/▼ to navigate through these data.
The sum of readings divided by the number of readings.
average value = ∑x/n
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MEASUREMENT FOUNDATION
ZCT 777
Standard Deviation(Sdev.)
The sample standard deviation is a statistic that measures how “spread out” the sample is around the sample mean.
Standard deviation calculates in the following way:
Variance S2= ∑(x- -)2 /(n-1)
Auto power off (menu item 2.7)
You can disable Auto-power-off via MENU system.
Limit Function (menu item 3)
Limits can be entered during and after a series of measurements. There is practical use for limits.
Any reading which falls outside the set tolerance limits will be registered by a warning indication:
H: reading above HI limit
L: reading below LO limit
Please set the limit values using MENU system for reading above (menu item 3.1.1) and for reading below (menu item
3.1.1). Use buttons ▲/▼.
Delete Functions (menu item 4)
In MENU system, you can nd following function:
Delete current data: If you nd the last measuring reading is wrong, you can delete it via this function (menu item 4.1). At
the same time, the statistics will be updated.
Delete all data: You can delete all data and statistics of the Current Work Mode (menu item 4.2).
Delete Group data: this function includes “Delete all data” function (menu item 4.3).
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MEASUREMENT FOUNDATION
ZCT 777
Total-Reset
A total reset erases data from all memories. This includes all sets of readings of all work modes plus their associated
statistics, calibration values and tolerance limits.
a) Switch off gauge.
b) Press ZERO+ simultaneously.
c) The LC display “sure to reset”, Press red-bar button for YES, or blue-bar button for NO.
d) The gauge will restart automatically.
e) If you want to cancel “NO”from the reset, press blue button.
Measurement view (menu item 5)
Via “Measurement view” in MENU, you can look through all measurement readings for current group.
Calibration (menu item 6)
There are three different methods available for calibration:
“Zero-point calibration”: recommended if measuring errors up to +-(3% of reading plus constant error of probe) are
1.
permitted. (Example for constant of probe be error: Fe 1um; no-Fe 1.5um)
“One-point calibration” (calibrating using a calibration foil): recommended if readings to be expected will be close
2.
to the calibration value and if the permitted error of probe will be max. +-(1%...3% of reading plus constant probe
error)
“Two-point calibration” (using a set of two calibration foils):
3.
A ) Recommended for measurements on rough surfaces.
B) Recommended for precise measurements on smooth surface if the thickness to be expected lies between that
of the two calibration foils.
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MEASUREMENT FOUNDATION
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