HD-F779 Mattress Firmness Tester

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HD-F779 Mattress Firmness Tester

for reference only

 Product Description:

Use a spherical protruding at the bottom of the circular rigid plate loading, record force and deflection to analysis, and then assess the mattress hardness values ​​and hardness levels.


Design Standard: ASTM 1566-6


 Main Technical Parameters

The platen weight and diameterA round aluminum disk weighing 8 ± 0.2 lb (3.6 ±0.1 kg) with a diameter of 13.54±0.2 in. (344 ±5 mm)
Load senorTECSIS brand, max capacity 2000N with accuracy ±1 %.
Test speed50mm/min
Test positionFive locations, the load platen can adjust and position the test point by motor automatically
Test strokeAt each test location, determine resistance values in 0.5-lbf (2-N) increments at 0.5, 1, 1.5, 2, 2.5, and 3 in. (12.5, 25, 38, 50, 63, and 76 mm) with a tolerance of ±0.04 in. (±1 mm) of deflection of the top surface for innersprings and 0.5 and 1 in. (12.5 and 25 mm) with a tolerance of ±0.04 in. (±1mm) of deflection of the top surface for box springs.
Control methodPLC control, LCD touch screen interface
Other functionWith USB port, output the test results
Power1 phase, AC 220V, 50/60Hz


Quality guarantee 

A)  Quality assurance items

The guarantee period with FOC within one year (not including nonexpendable & transport and travel fees)

1. During the guarantee period, Haida shall supply free maintenance or replacement for the damaged part(just for nonexpendable part) induced by non-human damage;

2. If any quality problems occurs within the guarantee period, and Haida must provide on-site service, the transport and travel expense shall be borne by customer;

3. If any big quality problems occurs out of the guarantee period, Haida will provide a maintain service, the transport and travel expense shall be borne by customer, also charge for a favorable price;

4. Haida will provide a lifetime favorable price to the buyer with the materials and spare parts used in system operation, equipment maintenance;

B)  The main quality warranty maintenance certificate

If there is any dispute please refer to our guarantee letter, so:

 please keep the guarantee letter, if you lost it, please connect with us in a month.

 If the guarantee letter has been altered or it has no our stamp, it is useless.

C)  The following conditions need to be paid reasonably even in the assurance period:

 Natural reasons

 Operating mistakes

 Voltage is not fit for our operation instruction

 Repack it without our guides

 Damaged for borrowing to others

 Damaged for authorized machine modification

 Damaged for authorized calibration

 Authorized transshipment mistake

 Serve for long distance area

D)  Attentions

 Any service outside Guangdong, China, transport and travel fees shall be paid by customer.

 The apparatus try not to be used in the following situations:

a. Vibration, rocking the occasion.

b. Direct sunlight.

c. Hot, dusty, damp places.

d. To ensure safe, AC supply of the machine should be well grounded.

e. Do not use strong solvents (such as: benzene, nitro oil) washing machine.

f. Do not inject water and debris into the machine; prevent damage to electrical components and electrical shock.

g. Instrument displays the disassembly and debugging can only be measured by the State Department approved the units and the company, other people not allowed to overhaul.

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